Attenuation slice switching device

Abstract

An attenuation slice switching device comprises a driving mechanism, a guide supporting mechanism and an attenuation slice installation switching mechanism. The driving mechanism comprises a telescopic push rod and a telescopic rod bracket; the guide supporting mechanism comprises a linear guide rail, a guide rail switching block and a sliding block; the attenuation piece installation switching mechanism comprises a switching support, and an installation groove is formed in the switching support and used for arranging an optical filter. At least two telescopic push rods are arranged, and the fixed ends of the telescopic push rods are connected with the telescopic rod bracket; the free end of each telescopic push rod is connected with a switching support, a sliding block is arranged below the switching support, and the sliding blocks are matched with linear guide rails to form a sliding pair. And the linear guide rail is arranged on the guide rail switching block.

Description

Technical Field

[0001] The utility model belongs to the technical field of multi-mode optical fiber encircled flux testing, and in particular relates to an attenuation sheet switching device. Background Art

[0002] An attenuator is an optical or electromagnetic element used to reduce the intensity of light or electromagnetic waves passing through it without significantly changing other characteristics of the wave, such as wavelength or phase. It is often used to control the intensity of a laser beam, reduce signal strength to prevent saturation or damage to detection equipment, and adjust experimental conditions. Attenuators can be fixed attenuation (with a constant attenuation ratio) or adjustable attenuation (the attenuation intensity can be adjusted manually or automatically); Multimode fiber encircled flux testing is a test method used to evaluate the performance of multimode fiber links. Specifically, this test evaluates the transmission capacity and loss of an optical fiber under specific conditions by inputting an optical signal into one end of the optical fiber and receiving and measuring the output of the signal at the other end of the optical fiber; an attenuator needs to be used and switched during the test;

[0003] Compared with single-mode fiber, multimode fiber has a larger core diameter (usually 50 or 62.5 microns), which can support multiple light beams to propagate in different paths. Therefore, the multimode fiber loop-through test must consider the interference between each mode and the attenuation characteristics of different modes.

[0004] Multimode fiber encircled flux testing allows technicians to effectively evaluate the performance of a fiber link to ensure it meets the requirements of a specific application.

[0005] The function of switching attenuators is to control the signal strength through the optical path or circuit by adjusting the attenuator. Different attenuators have different attenuation values ​​(i.e. the ability to weaken the signal). Switching attenuators can achieve the following purposes:

[0006] 1. Control light intensity: In optical experiments or equipment, by switching different attenuators, the light intensity passing through the optical fiber, light beam or other optical path can be accurately adjusted to avoid excessive light signals causing detector saturation or equipment damage.

[0007] 2. Signal debugging: In the communication system, by switching the attenuation sheet, different signal loss conditions can be simulated to help test and debug the performance of the equipment and ensure that it can work normally under different signal strengths.

[0008] 3. Dynamic adjustment: In some cases, it is necessary to change the intensity of the optical signal in real time during the experiment or operation. Switching the attenuator can achieve this dynamic adjustment to ensure that the signal meets specific requirements at different stages.

[0009] 4. Protect equipment: In high-power laser systems, switching attenuation sheets can reduce laser power and protect subsequent optical components or detectors from damage.

[0010] There are the following technical defects:

[0011] Inefficient manual operation: During the test process of existing equipment, the operator needs to manually adjust the light intensity by turning the attenuation plate. This operation method is not only time-consuming, but also prone to misoperation or inaccurate adjustment due to human factors, thus affecting the accuracy of the measurement.

[0012] Complex manual reset: After each use of the device, the attenuator needs to be manually reset to its initial position; this not only increases the number of operating steps, but may also lead to deviations in subsequent test results due to untimely or incomplete reset;

[0013] Slow switching speed of attenuators: In actual operation, the manual switching speed of attenuators is slow, especially when attenuators of different specifications need to be frequently switched, which further reduces the efficiency of the test and affects the progress of the multimode fiber ring flux test;

[0014] However, the existing equipment requires manual switching of the attenuation plate and manual reset each time the equipment is used, which leads to low efficiency of subsequent measurements and cumbersome switching.

[0015] In the case of large-scale testing, manual switching is redundant and cumbersome, which affects the test efficiency. Therefore, there is a lack of technical means to quickly switch attenuation sheets, which is suitable for large-scale testing and replace the attenuation sheets required for preset specification tests. Utility Model Content

[0016] The present application provides a device for quickly switching attenuation sheets, which can improve the problem of low subsequent measurement efficiency caused by the need for manual attenuation sheet switching and manual resetting of the existing equipment each time the equipment is used; another purpose of the present application is to provide a method for switching attenuation sheets; the upper computer sends instructions to control the electric push rod to achieve extension and retraction actions, drive the attenuation sheet to move quickly on the guide rail, and realize fast switching of attenuation sheets of different specifications, thereby absorbing part of the light and avoiding luminous flux saturation.

[0017] In order to overcome the above problems of the prior art and achieve the above objectives and other related objectives, the present application provides an attenuation sheet switching device, including a driving mechanism, a guide support mechanism, and an attenuation sheet installation switching mechanism;

[0018] The driving mechanism includes a telescopic push rod and a telescopic rod bracket;

[0019] The guide support mechanism includes a linear guide rail, a guide rail adapter block, and a slide block;

[0020] The attenuation plate installation switching mechanism comprises a switching bracket, and the switching bracket is provided with a mounting groove, and the mounting groove is used to set the filter;

[0021] There are at least two telescopic push rods, and the fixed ends of the telescopic push rods are connected to the telescopic rod brackets; the free end of each telescopic push rod is connected to the switching bracket, and a slider is arranged below the switching bracket, and the slider cooperates with a linear guide to form a sliding pair; the linear guide is arranged on the guide adapter block;

[0022] The fast switching attenuation plate device provided by the present application realizes fast and accurate switching of the attenuation plate through an automated control method, solves the problems of low manual operation efficiency, complex manual reset, slow switching speed, etc. in the prior art, thereby greatly improving the efficiency and accuracy of multimode optical fiber ring flux testing;

[0023] The present application can realize automatic switching of attenuation sheets by using a telescopic push rod, thus avoiding the inefficiency and risk of misoperation caused by manual operation; at the same time, the design of multiple push rods enhances the stability and control accuracy of the device, making the switching of attenuation sheets smoother and more accurate;

[0024] The combination of the linear guide and the slider forms a stable guiding mechanism, ensuring that the attenuator can move smoothly along the predetermined path during the switching process; the use of the guide adapter block further simplifies the installation structure, making the device more compact and conducive to flexible deployment in different test environments;

[0025] The attenuation plate installation switching mechanism includes a switching bracket, and a mounting groove is provided on the switching bracket for mounting the filter; through the action of the telescopic push rod, the switching bracket can move quickly on the guide rail, thereby realizing the switching of attenuation plates of different specifications;

[0026] The switch bracket makes the installation and replacement of the attenuator very convenient, and also allows the filters of different specifications to be quickly switched as needed during the test process; this design not only improves the flexibility of the equipment, but also ensures that the intensity of the optical signal can be accurately adjusted to avoid light flux saturation and protect the safety of the test equipment;

[0027] Through this device, the tester can send instructions through the host computer to control the telescopic action of the electric push rod, drive the attenuation sheet to move quickly on the guide rail, and easily achieve fast switching of attenuation sheets of different specifications. Compared with the prior art, this application has the following advantages:

[0028] Efficiency: Automated control greatly reduces the time and errors of manual operation and improves the overall testing efficiency.

[0029] Accuracy: The multi-push rod design and the linear guide support structure ensure the smoothness and accuracy of the attenuation sheet switching, further improving the accuracy of the test.

[0030] Simplicity: The modular design makes the installation, removal and switching of the attenuator more convenient, reduces the operation steps and simplifies the test process.

[0031] Therefore, this application combines PLC with display screen, touch screen, etc. to achieve better switching effect and further improve the level of automation;

[0032] A technical solution provided by this application also has the following technical features:

[0033] Preferably, in one embodiment of the present application, the free end of the telescopic push rod is connected to at least two switching brackets, and the adjacent switching brackets are pulled and set with a gap; the free end of the telescopic push rod pulls the switching bracket to move at least three working positions, so that the filter of at least one switching bracket is in the working position, or the filters are all in the non-working position;

[0034] The free end of the telescopic push rod is connected to at least two switching brackets, and the adjacent switching brackets are connected by traction with a certain gap left; a more complex and flexible attenuation plate switching mechanism is realized, so that filters of different specifications can be more accurately selected or moved out of the working position during the test process;

[0035] The free end of the telescopic push rod is connected to at least two switching brackets; the adjacent switching brackets are connected by traction, which ensures that each bracket can move in a coordinated manner when the push rod is driven; in addition, gaps are set between the brackets to avoid mutual interference;

[0036] The design of multiple switching brackets enables the device to accommodate and switch filters of various specifications; through the traction connection method, it ensures that all filters can be moved in a predetermined order, ensuring the smoothness and reliability of operation; the setting of the gap further improves the stability of the filter switching process, avoiding jamming or malfunction caused by overly close arrangement;

[0037] The free end of the telescopic push rod can switch the filter to at least three working positions by pulling the switching bracket; these positions include: at least one filter is in the working position, and all filters are in the non-working position; providing a more flexible operation mode, for example, in the multi-mode fiber ring flux test, the appropriate filter can be quickly selected to enter the working position according to the actual test needs without manual adjustment; at the same time, all filters can be moved to the non-working position for equipment maintenance or filter replacement; this multi-position switching function not only improves the convenience of operation and the flexibility of testing, but also further ensures the accuracy and efficiency of the test process.

[0038] Preferably, in one embodiment of the present application, the telescopic push rod is an electric push rod, a pneumatic push rod or a hydraulic push rod; according to different application requirements and environmental conditions, the telescopic push rod can be an electric push rod, a pneumatic push rod or a hydraulic push rod. These push rod types have their own characteristics and are suitable for different scenarios;

[0039] Preferably, in one embodiment of the present application, two switching brackets are arranged in parallel; the parallel arrangement of the switching brackets means that the two brackets maintain a parallel arrangement in space, which can ensure that the movement path of each filter is consistent during the filter switching process.

[0040] Preferably, in one embodiment of the present application, the two telescopic push rods are arranged in parallel, that is, the two push rods are arranged side by side in the same plane, and their telescopic directions are consistent. This arrangement ensures the synchronization of the push rods when driving the switching bracket.

[0041] Preferably, in one embodiment of the present application, the mounting groove on the switching bracket is circular, which can fix the filter more stably and accurately. The circular mounting groove can make the filter have a uniform force distribution on the bracket, avoiding the movement or loosening of the filter due to irregular shape or uneven force.

[0042] Preferably, in one embodiment of the present application, a base plate is arranged below the telescopic rod bracket and the guide rail adapter block, providing a stable and solid basic support structure; the setting of the base plate helps to fix the entire device and avoid the stability of the device being affected by vibrations generated during operation or other external factors.

[0043] Preferably, in one embodiment of the present application, the telescopic rod bracket and the guide rail adapter block are fastened to the base plate by threaded parts; the telescopic rod bracket and the guide rail adapter block are fastened to the base plate by threaded parts, ensuring a firm connection between the components; the threaded fasteners have reliable connection strength and facilitate disassembly, assembly and adjustment of the device.

[0044] Preferably, in one embodiment of the present application, the linear guide rail is fastened to the guide rail adapter block by means of screws to form a stable and reliable connection relationship.

[0045] Preferably, in one embodiment of the present application, the lower end surface of the switching bracket is fastened to the sliding block by a screw member.

[0046] Preferably, in one embodiment of the present application, the telescopic push rod and the telescopic rod bracket are hinged, that is, a hinge or a similar connection mechanism is used to enable a relative angle change between the two.

[0047] Preferably, in one embodiment of the present application, the telescopic push rod and the switching bracket are hinged, that is, a hinge or a similar connecting mechanism is used to enable a relative angle change between the two.

[0048] Preferably, in one embodiment of the present application, a display screen or a touch display screen, a PLC or a host computer, and a switch button are provided to cooperate with the extension or retraction of the telescopic push rod to move the target filter to the target position.

[0049] Preferably, in one embodiment of the present application, at least one mounting slot is provided on the switching bracket, and a filter is correspondingly provided on the mounting slot; that is, two mounting slots or more than two mounting slots are provided on one switching bracket; such that the corresponding filter switching can be realized by passing through different positions of such a switching bracket;

[0050] The beneficial effects of this application are:

[0051] 1. The present application provides a path for quickly switching attenuation sheets, which can quickly switch different attenuation sheets. The action is fast and effective, and it is easy to expand. That is, to add more attenuation sheets, you only need to incorporate more of the present application, or add a switching bracket for the attenuation sheet;

[0052] 2. The attenuation sheet of the utility model moves quickly according to the instructions of the host computer or the switch button to achieve automation, quickly reach the specified position, and attenuate the light intensity. Compared with the existing equipment that requires manual dialing of the attenuation sheet, the system can automatically and quickly pop out and retract it, thereby improving the test efficiency; after the system is powered on, the attenuation sheet automatically returns to its position and is at zero attenuation, which simplifies the operation steps compared to the existing equipment that requires manual dialing to reset.

[0053] 3. The technical solution of the present application adopts an automatic drive device such as an electric push rod, a pneumatic push rod or a hydraulic push rod to replace manual operation to realize automatic switching of attenuation plates. By controlling the telescopic action of the electric push rod by the host computer, it is possible to quickly and accurately switch between multiple attenuation plates, thereby significantly improving the degree of automation of the operation and avoiding the inconvenience and errors caused by manual switching; it overcomes the technical defect that the existing equipment relies on manual switching of the attenuation plate in the multimode optical fiber ring flux test, which is not only inefficient but also easy to cause misoperation;

[0054] 4. The manual reset process in the prior art is complicated, which affects the continuity and efficiency of the test. This application sets a linear guide rail and a slider on the guide support mechanism to make the attenuation plate move more smoothly and position more accurately on the switching bracket. At the same time, by reasonably configuring the connection between the switching bracket and the electric push rod, the switching bracket can be quickly switched between multiple predetermined positions, shortening the test preparation time and greatly improving the test efficiency.

[0055] 5. In this application, by setting multiple mounting slots on the switching bracket and designing reasonable gaps between the switching brackets, accurate positioning and rapid switching of attenuation sheets of different specifications are ensured, the deviation caused by manual switching is reduced, and the accuracy and consistency of the test are ensured;

[0056] 6. This application enhances the stability of the device by fastening the telescopic rod bracket, the guide rail adapter block, the bottom plate and other key structures with threaded parts; the hinged connection design makes the force transmission between the push rod and the switching bracket more uniform, reduces mechanical wear and extends the service life of the device; at the same time, the introduction of the linear guide ensures the smooth movement of the switching bracket, prevents positioning errors caused by deformation or wear of the guide rail, and further improves the durability of the equipment;

[0057] 7. The technical solution of the present application reduces the number of operating steps and the difficulty of maintenance through automation and modular design. The combined design of the electric push rod, the switching bracket and the linear guide makes it easier to replace the attenuation plate and adjust the parameters of the equipment. At the same time, since the key components adopt threaded connection and hinged design, disassembly and maintenance are also easier, and users can quickly adjust or repair the equipment, reducing downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic diagram of the structure of an attenuation sheet switching device of the utility model;

[0059] Figure 2 It is a top view of an attenuation sheet switching device of the utility model;

[0060] Figure 3 This is a working diagram of an attenuation sheet switching device of the utility model;

[0061] Components in the picture:

[0062] 1. Telescopic push rod

[0063] 2. Telescopic rod bracket

[0064] 4. Linear guide

[0065] 5. Guide rail adapter block

[0066] 6. Sliders

[0067] 7. Switch bracket

[0068] 8. Filter. DETAILED DESCRIPTION

[0069] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings. These implementation methods are only used to illustrate the present application, and are not intended to limit the present utility model.

[0070] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0073] like Figure 1-3 , an attenuation sheet switching device, comprising a driving mechanism, a guide support mechanism, and an attenuation sheet installation switching mechanism;

[0074] The driving mechanism comprises a telescopic push rod 1 and a telescopic rod bracket 2;

[0075] The guide support mechanism includes a linear guide rail 4, a guide rail adapter block 5, and a slide block 6;

[0076] The attenuation plate installation switching mechanism comprises a switching bracket 7, and a mounting groove is arranged on the switching bracket 7, and the mounting groove is used to arrange the filter 8;

[0077] There are at least two telescopic push rods 1, and the fixed ends of the telescopic push rods 1 are connected to the telescopic rod bracket 2; the free end of each telescopic push rod 1 is connected to the switching bracket 7, and a slider 6 is arranged below the switching bracket 7, and the slider 6 cooperates with the linear guide rail 4 to form a sliding pair; the linear guide rail 4 is arranged on the guide rail adapter block 5.

[0078] When implementing this application, the implementation points include the following three aspects:

[0079] 1. Driving mechanism: The core component is at least two telescopic push rods, which can be electric, pneumatic or hydraulic. The free ends of the push rods are connected to the switching bracket, which drives the movement of the attenuation sheet through telescopic action.

[0080] 2. Guide support mechanism: including linear guide rails, guide rail adapter blocks and sliders; the switching bracket is installed on the slider, and the linear guide rails are used to achieve smooth linear movement to ensure accurate positioning of the attenuation sheet during switching;

[0081] 3. Attenuation plate installation switching mechanism: The switching bracket is provided with a mounting slot for placing filters of different specifications; multiple switching brackets can be arranged in parallel, and the telescopic movement of the push rod can enable the filter to quickly switch between different working positions;

[0082] The working principle is as follows: the device sends control instructions through the host computer to drive the telescopic push rod to perform telescopic action; the telescopic push rod drives the connected switching bracket to move along the linear guide rail, and the filter on the switching bracket moves on the guide rail to enter or exit the optical path; by switching filters of different specifications, the intensity of the optical signal is controlled, which plays a role in attenuating the light and avoiding luminous flux saturation.

[0083] The working process is as follows:

[0084] 1. Initialization: After the device is started, the host computer sends instructions according to the test requirements and selects the required filter;

[0085] 2. Push rod action: After receiving the command, the telescopic push rod begins to extend or retract, driving the switching bracket to move on the guide rail;

[0086] 3. Filter switching: The filter enters the preset working position according to the action of the push rod and adjusts the intensity of the light signal;

[0087] 4. End of operation: After the test is completed, the push rod is reset, and the switch bracket drives the filter out of the working position to prepare for the next operation;

[0088] The embodiment of the present application realizes the automatic and rapid switching of the attenuation plate, avoids the low efficiency and high error of manual operation, and significantly improves the efficiency and accuracy of multimode optical fiber ring flux testing.

[0089] Specifically, in one embodiment of the present application, the free end of the telescopic push rod 1 is connected to at least two switching brackets 7, and the adjacent switching brackets 7 are pulled and set with a gap; the free end of the telescopic push rod 1 pulls the switching bracket 7 to move at least three working positions, so that the filter 8 of at least one switching bracket 7 is in the working position, or the filters 8 are all in the non-working position;

[0090] Flexibility of this embodiment: through the design of multiple switching brackets, the device can accommodate and operate a variety of filters to meet the needs of different test scenarios and provide greater operational freedom;

[0091] The accuracy of this embodiment: the traction setting of adjacent brackets ensures the accurate positioning and switching of the filter, while the gap design avoids mechanical interference that may occur during the switching process, ensuring the accuracy of the switching action;

[0092] The high efficiency of this embodiment: the telescopic push rod can quickly switch between multiple working positions, avoiding delays and errors caused by manual operation, greatly improving the test efficiency, especially in tests that require frequent replacement of filters.

[0093] Specifically, the telescopic push rod 1 is an electric push rod, a pneumatic push rod, or a hydraulic push rod;

[0094] Electric push rod: driven by electricity, the push rod's telescopic length and speed can be precisely controlled, which is suitable for scenarios that require high-precision adjustment.

[0095] Pneumatic push rod: driven by air pressure, suitable for scenarios requiring fast response and high thrust, and with low maintenance costs;

[0096] Hydraulic push rod: driven by liquid pressure, it can provide greater thrust and is suitable for occasions requiring high-intensity operation;

[0097] This embodiment flexibly adapts to different working environments and technical requirements; for example, the electric push rod can provide high-precision displacement control, which is suitable for optical tests that require precise adjustment of the filter position; while the pneumatic and hydraulic push rods can provide stronger power output, which is suitable for high-intensity or fast-switching test environments; this diversified design ensures the wide applicability of the device under different conditions.

[0098] Specifically, in one embodiment of the present application, two switching brackets 7 are arranged in parallel; the switching brackets arranged in parallel can ensure that multiple filters have a unified motion trajectory when switching, avoiding the position deviation or tilt of the filters caused by the non-parallel brackets, thereby improving the stability and accuracy of the switching. In addition, this design also simplifies the structure of the device, reduces the complexity of adjustment and maintenance, and further improves the reliability of the device.

[0099] Specifically, in one embodiment of the present application, two telescopic push rods 1 are arranged in parallel. The parallel telescopic push rods can provide a more balanced and stable driving force, avoiding the tilting or jamming of the bracket caused by the non-parallelism of the push rods; especially when multiple filters or heavier brackets need to be moved at the same time, the parallel push rod design can ensure the coordination of various parts, reduce wear or failure caused by uneven mechanical stress, and thus extend the service life of the equipment.

[0100] Specifically, in one embodiment of the present application, the mounting groove on the switching bracket 7 is circular;

[0101] The stability of this embodiment: the circular mounting groove ensures the stability of the filter on the switching bracket, and it will not shake or fall off even during fast movement;

[0102] This embodiment achieves precise positioning: the circular structure facilitates the alignment and installation of the filter, improves the switching accuracy, and ensures the accuracy of the optical path adjustment;

[0103] Specifically, in one embodiment of the present application, a bottom plate is provided below the telescopic rod bracket 2 and the guide rail adapter block 5;

[0104] Structural stability of this embodiment: The bottom plate provides a stable base to prevent the device from shifting or tilting during operation, ensuring the reliability of the device operation;

[0105] The installation convenience of this embodiment: the base plate provides a unified platform for the assembly and fixation of the entire device, simplifying the installation and maintenance work.

[0106] Specifically, in one embodiment of the present application, the telescopic rod bracket 2 and the guide rail adapter block 5 are fastened to the bottom plate by screws;

[0107] This embodiment achieves a firm connection: the threaded fastener provides a strong connection force, ensuring the stability of the telescopic rod bracket and the guide rail adapter block to prevent loosening or displacement;

[0108] This embodiment achieves convenient maintenance: the threaded fastening method facilitates disassembly and maintenance of the device, helps in rapid assembly and on-site adjustment of the equipment, and improves the maintainability and service life of the device.

[0109] Specifically, in one embodiment of the present application, the linear guide rail 4 is fastened to the guide rail adapter block 5 by means of a screw member;

[0110] This embodiment achieves a stable and reliable installation: the threaded fastening method ensures a firm connection between the linear guide rail and the guide rail adapter block, avoids loosening or displacement during operation, and ensures the stability of the guide rail;

[0111] This embodiment achieves precise alignment: the threaded member can provide precise positioning and alignment, ensuring accurate docking between the linear guide rail and the guide rail adapter block, thereby ensuring smooth movement of the slider on the guide rail;

[0112] This embodiment achieves convenient assembly and maintenance: threaded fasteners are used to facilitate assembly and disassembly of the device, and to facilitate maintenance, replacement or adjustment of the guide rails when necessary, thereby improving the maintainability and service life of the device.

[0113] Specifically, in one embodiment of the present application, the lower end face of the switching bracket 7 is fastened to the slider 6 by a threaded part, and the threaded fastening method ensures a firm connection between the switching bracket and the slider, avoiding shaking or loosening during the switching process, and ensuring stable movement of the filter; through the fastening of the threaded part, the position of the switching bracket can be accurately controlled to ensure that the filter can be accurately switched to a predetermined working position or non-working position, thereby improving the switching accuracy; the threaded fastening method makes the installation and disassembly of the switching bracket and the slider easier, and is convenient for quick adjustment or replacement when needed, thereby improving the overall maintenance efficiency of the device.

[0114] Specifically, in one embodiment of the present application, the telescopic push rod 1 and the telescopic rod bracket 2 are hinged, and the hinged connection allows the telescopic push rod to have a certain angle adjustment capability during the telescopic process, adapting to the slight deviation or displacement that may exist in actual operation, and ensuring the smoothness of the push rod movement;

[0115] The hinged connection can disperse and relieve the mechanical stress generated by the push rod during the extension and retraction process, reduce the wear and fatigue of the components, and improve the durability and service life of the device;

[0116] Through the hinged connection, the movement of the telescopic push rod is smoother, reducing the vibration or impact caused by the rigid connection, ensuring the stable movement of the switching bracket.

[0117] Specifically, in one embodiment of the present application, the telescopic push rod 1 and the switching bracket 7 are hinged; the hinged connection allows the telescopic push rod to have greater freedom of movement when driving the switching bracket to move, adapting to different switching angles and path requirements, and ensuring a smooth and precise switching process; the hinged connection helps to maintain the alignment of the switching bracket with the guide rail during the extension and retraction of the push rod, avoiding offset or jamming caused by a fixed connection, and improving the reliability of switching; through the hinged connection, the relative movement between the telescopic push rod and the switching bracket is softer, reducing friction and wear, and extending the service life of the device; the hinged connection makes the mechanical connection between the push rod and the switching bracket more flexible, reduces dependence on complex guide structures, simplifies the overall mechanical design, and improves the manufacturability and assembly efficiency of the device.

[0118] Specifically, in one embodiment of the present application, another object of the present application is to provide a method for switching attenuation plates. On the first aspect, the embodiment of the present application provides a device for quickly switching attenuation plates, which includes: a movable component, which is configured with two electric push rod retractable parts, two attenuation plate brackets connected to the electric push rods, and two sliders fixed to the base of the attenuation plate bracket; a fixed component, which is configured with two electric push rod main parts, a guide rail adapter block, two linear guides fixed on the guide rail adapter block, and a push rod bracket that is separated from the guide rail adapter block by a preset distance and is used to fix the electric push rod mounting hole; the preset distance is the length of the electric push rod main part; the guide rail adapter block and the push rod bracket are both installed on the bottom plate, the electric push rod is parallel to the bottom plate, the movable component moves in parallel, and the moving distance is the length of the retractable part of the electric push rod. The electric push rod has two extreme positions: extended. The system can extend the optical path to the limit and retract to the limit, and then stop the action. When the extended limit position is reached, the attenuation sheet blocks the light path. When the attenuation sheet is retracted to the limit origin, the attenuation sheet does not block the light path. Two circular neutral density filters of different specifications are fixed in the circular holes on the attenuation sheet bracket. The system can be operated by pressing the buttons on the screen. The attenuation sheet of the corresponding specifications can be selected to block the light path according to the measurement situation. The attenuation sheet has four working states that can be switched at will: 1. No attenuation: Both attenuation sheets do not block the light path. 2. Attenuation 10dB: The first attenuation sheet blocks the light path, and the second one does not. 3. Attenuation 20dB: The second attenuation sheet blocks the light path, and the first one does not. 4. Attenuation 30dB: Both attenuation sheets block the light path at the same time.

[0119] On the second aspect, an embodiment of the present application provides a method for quickly switching attenuation plates, which includes: utilizing the retractable function of an electric push rod to drive the attenuation plate bracket assembly to slide on a linear guide rail; utilizing the push rod bracket and the attenuation plate bracket to fix the mounting holes at both ends of the electric push rod, so that the retractable part of the electric push rod moves in a direction perpendicular to the optical path; the push / pull force of the electric push rod is 0.6kg, and the speed is 10mm / s, so fast action can be achieved.

[0120] Specifically, in one embodiment of the present application, the workflow of the method for quickly switching attenuation sheets is as follows: first, click "Check" on the screen to enter the image check mode, and check the image exposure level. If it is overexposed, click "Auto Exposure" to optimize it; if the requirements are not met, click attenuation "10×", "20×", and "30×" in turn, and use the attenuation sheet to attenuate the light intensity. During the process, you can click "Auto Exposure" to perform corresponding exposure optimization. After the above operation, the image is still saturated, and an external attenuator can be connected until the image meets the test requirements. Click "Test" to start measuring the multimode fiber ring flux.

[0121] In summary, the utility model aims to solve the following problems of the existing attenuation plate switching device in the multimode optical fiber ring flux test: low efficiency of manually turning the attenuation plate, complex manual resetting during the test, slow switching speed of the attenuation plate, and cumbersome operation during the test. The utility model provides a device and method for quickly switching attenuation plates, which realizes the automatic and rapid switching of attenuation plates by introducing an electric push rod, an articulated connection, and a threaded fastening structure. The device can accurately move the switching bracket through the automatic control of the electric push rod, and quickly switch attenuation plates of different specifications, thereby improving the test efficiency, simplifying the operation steps, and reducing the impact of human error. In addition, through the improved structural design, the utility model also enhances the stability, accuracy and maintenance convenience of the device, and significantly improves the service life and overall working performance of the equipment. .

[0122] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A damping sheet switching device, characterized in that: It includes a driving mechanism, a guide support mechanism, and an attenuation sheet installation switching mechanism; The driving mechanism comprises a telescopic push rod (1) and a telescopic rod bracket (2); The guide support mechanism comprises a linear guide rail (4), a guide rail adapter block (5), and a slide block (6); The attenuation plate installation switching mechanism comprises a switching bracket (7), the switching bracket (7) is provided with a mounting groove, and the mounting groove is used to set the filter (8); There are at least two telescopic push rods (1), and the fixed ends of the telescopic push rods (1) are connected to the telescopic rod bracket (2); the free end of each telescopic push rod (1) is connected to the switching bracket (7), and a slider (6) is arranged below the switching bracket (7), and the slider (6) cooperates with a linear guide rail (4) to form a sliding pair; the linear guide rail (4) is arranged on a guide rail adapter block (5).

2. The attenuation sheet switching device according to claim 1, characterized in that: The free end of the telescopic push rod (1) is connected to at least two switching brackets (7), and adjacent switching brackets (7) are pulled and arranged with a gap; the free end of the telescopic push rod (1) pulls the switching bracket (7) to move to at least three working positions, so that the filter (8) of at least one switching bracket (7) is in a working position, or the filters (8) are all in a non-working position.

3. The attenuation sheet switching device according to claim 1, characterized in that: The telescopic push rod (1) is an electric push rod, a pneumatic push rod or a hydraulic push rod.

4. The attenuation sheet switching device according to claim 1, characterized in that: The two switching brackets (7) are arranged in parallel.

5. The attenuation sheet switching device according to claim 1, characterized in that: The two telescopic push rods (1) are arranged in parallel.

6. The attenuation sheet switching device according to claim 1, characterized in that: The mounting groove on the switching bracket (7) is circular.

7. The attenuation sheet switching device according to claim 1, characterized in that: A bottom plate is arranged below the telescopic rod bracket (2) and the guide rail adapter block (5).

8. The attenuation sheet switching device according to claim 1, characterized in that: The telescopic rod bracket (2) and the guide rail adapter block (5) are fastened to the base plate via screws; the linear guide rail (4) is fastened to the guide rail adapter block (5) via screws; the lower end surface of the switching bracket (7) is fastened to the slider (6) via screws; the telescopic push rod (1) and the telescopic rod bracket (2) are hinged; and the telescopic push rod (1) and the switching bracket (7) are hinged.

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